9 change the soft components
9-2．Operation Method
To the damaged input/output, we can change their mapping relation, replace the damaged
input/output points with other. This needn’t change the user program. In PLC special register, we
specify certain address section for user to change the mapping relation. User just finds the
mapping relation of the damaged input/output, replace the value in this special register with the
value of changed input/output.
Below is the table to modify the input/output point’s mapping ID:
Table1 mapping relationship of the Input and soft component
ID. FUNCTION DESCRIPTION
FD8010 X00 corresponds to I** X0 corresponds to the number of input mapping I**
FD8011 X01 corresponds to I**
FD8012 X02 corresponds to I**
…… ……
FD8073 X77 corresponds to I**
Table2 mapping relationship of the output and soft component
NO FUNCTION INSTRUCTION
FD8074
Y00 corresponds to O**
Y0 corresponds to the numeber of output mapping O**
FD8075
Y01 corresponds to O**
FD8076
Y02 corresponds to O**
…… ……
FD8137
Y77 corresponds to O**
As shown in the table above, the original value is FD8010 is 0, if replace it by value “7”, then
X7 will represent X0 in the program. But meantime you should change the value in FD8170 to be
0, to realize exchange. In this way, X0 will correspond with external input X7; X7 will correspond
with external input X0.
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